Calculate Date Difference in JSON Files Online
Calculate the difference between two date or timestamp columns in JSON files directly in your browser. Output in days, months, years, hours, minutes, or seconds — no upload required.
Drop your .json file here
or click to browse — max 50 MB
Frequently Asked Questions
Is my data private?
Yes — completely. Your file is never uploaded to any server. Everything runs locally in your browser using WebAssembly — processing happens entirely inside your tab. Once you close the tab, nothing is retained.
What is the maximum file size?
The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines handle 500 MB to 1 GB comfortably.
Related Tools
Convert CSV to JSON Online
Convert CSV files to JSON format directly in your browser. No upload required — your data never leaves your device.
Convert Parquet to JSON Online
Convert Parquet files to JSON format directly in your browser. No upload required — your data never leaves your device.
Convert JSON to CSV Online
Convert JSON files to CSV format directly in your browser. No upload required — your data never leaves your device.
Convert JSON to Parquet Online
Convert JSON files to Parquet format directly in your browser. No upload required — your data never leaves your device.
Convert JSON to TSV Online
Convert JSON files to TSV format directly in your browser. No upload required — your data never leaves your device.